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Eleven novel loci and 90 independent association signals have been identified for rheumatoid arthritis (RA), according to a study published in the May issue of the Annals of the Rheumatic Diseases.
Eunji Ha, from Kyung Hee University in Seoul, South Korea, and colleagues conducted a meta-analysis of genome-wide RA association summary statistics in three large case-control collections consisting of 311,292 individuals from Korean, Japanese, and European populations. Causal variants and genes, RA variant-implicating features, and potentially repurposable drugs for RA treatment were prioritized in computational analyses using public omics resources.
The researchers identified 11 new RA susceptibility loci, buy lipitor au no prescription which accounted for 6.9 and 1.8 percent of the single-nucleotide polymorphism-based heritability in East Asians and Europeans, respectively; in addition, 71 known nonhuman leukocyte antigen susceptibility loci were confirmed, identifying 90 independent association signals. Preferential locations for the RA variants were in binding sites of various transcription factors and in cell type-specific transcription-activation histone marks, highlighting the importance of CD4+ T-cell activation and suggesting a role for nonimmune organs in the pathogenesis of RA. Based on gene-based associations, expression-associated variants, and chromatin interactions, 615 plausible effector genes included targets of drugs approved for RA treatment and drugs approved for other indications that are potentially repurposable.
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